It can also affect your notions ability, an indication called fibro fog, and also your energy level, so you have extreme fatigue. Fibromyalgia and chronic fatigue syndrome are thought separate but related disorders. They share one common symptom -- severe fatigue that greatly disrupts people's lives. Fatigue is probably the most prominent the signs of fibromyalgia. Here's what your research actually says about how exactly to relieve fibromyalgia fatigue!